胶粉的生产利用现状及前景分析

废橡胶作为工业垃圾,已为世界所公认,介绍了废橡胶回收利用的意义和方法,着重阐述了胶粉的生产利用现状,并简要分析了胶粉的生产利用前景.     

我国废橡胶资源综合利用技术进展

1 我国废橡胶资源综合利用技术进展 近几年来,我国废橡胶利用的一些骨干企业和有关科研单位合作,根据市场需求,积极开发新的利用技术和设备,一些研究开发的新技术和设备在废橡胶利用行业中发挥了重要作用.     

我国废橡胶资源综合利用发展对策

1 指导思想 废橡胶利用指导思想是:坚持实施可持续发展战略,以提高废橡胶利用效率为目的,以市场需求为导向,贯彻执行国家法规和政策,依靠科技进步,加强科学管理,深化企业改革,增强自我发展能力,加快规模化进程,提高经济效益,促进废橡胶利用稳定、健康发展,以适应国民经济发展,环境保护和节约资源的需要.     

废橡胶清洁生产提速

正2018年6月7—8日,中国废橡胶综合利用行业绿色利用高峰论坛在河北定州举行。与会专家表示,我国废橡胶综合利用企业在清洁生产、环保技术、设备研发创新等方面取得众多进展,行业生产过程正加速实现绿色化。中国橡胶工业协会废橡胶综合利用分会秘书长祁学智指出,我国废橡胶综合利用行业正在加快清洁生产步伐,各     

我国废橡胶资源综合利用现状

1 我国废橡胶资源综合利用历史 我国废橡胶资源利用除了直接原形利用或简单加工后供作鞋底、胶桶、船用靠坝、胶线绳等产品外,主要是生产再生胶和胶粉. 我国利用废橡胶生产再生胶开创于1930年,生产方法主要是油法,产品质量差、产量低,解放以前发展十分缓慢,最高年产量为8 000 t,到解放前的1949年降到500 t.     

西北最大可再生资源基地在白银奠基

废旧家电、废橡胶塑料等污染物将变成循环利用的资源。近日,由甘肃省供销社和白银市政府共同推动的西北再生资源产业基地项目在白银市举行奠基仪式。该项目占地667万m^2,投资30亿元,是目前西北地区最大的可再生资源加工处理基地。     

《再生资源与循环经济》稿约

《再生资源与循环经济》是由中华全国供销合作恿社主管。中华全国供销合作总社天津再生资源研究所、中国再生资源回收利用协会主办,面向国内外公开发行的综合性技术刊物。主要宣传国家有关再生资源回收利用和循环经济的方针、政策。着重介绍国内外再生资源回收、加工利用、垃圾资源化处理、环保产业、循环经济等领域的新技术、新工艺、新设备,涉及废钢铁、废有色金属、废稀贵金属、废塑料、废橡胶、废化纤、废造纸原料、废电池、废旧家电、垃圾处理、废水利用、清洁生产等诸多方面。欢迎从事再生资源回收利用、循环经济及相关领域工作和研究的专家、学者踊跃投稿。     

专利资讯

专利名称:活化废橡胶粉及其制备方法和改性沥青及其制备方法专利申请号:CN201010151059.2公开号:CN101817946A申请日:2010.04.19公开日:2010.09.01申请人:交通部公路科学研究所本发明涉及一种活化废橡胶粉及其制备方法,该活化废橡胶粉由含有废橡胶粉、软化剂和/或橡胶活化剂的混合物     

河南省秸秆能源化利用研究

在日益严峻的能源短缺和环境污染的双重压力下,进行秸秆能源化的开发和利用对于河南新型城镇化建设具有重大战略意义.河南秸秆资源丰富,但秸秆能源化利用尚处于初级阶段,利用率非常低,只有健全秸秆收储体系,改进各种秸秆能源化利用方式的技术性能,加强应用和推广,提升秸秆能源化利用的经济效益,加大对秸秆能源化利用相关主体的引导和扶持,提供政策和资金支持,才能为河南秸秆能源化发展提供良好的环境.     

扬州市农作物秸秆能源化利用的实践与启示

秸秆是一种具有多用途的可再生的生物资源。介绍了扬州市的几种秸秆高效能源化利用的方式,分析了扬州市秸秆能源化利用的现状和特点。扬州市秸秆能源化快速发展的实践,将给人们带来许多有益的启示和借鉴。     

欧盟包装废物管理和总体产生特性分析

欧盟旱在1994年就颁布了包装和包装废物的指令,提出了包装废物管理的目标和管理内容,要求各成员国采取积极的经济和法律措施,建立自由流通的公平市场秩序。通过研究评估表明,包装和包装废物指令的实施产生了多方面的积极影响。统计数据表明,历年包装废物回收总量平稳增加,处置量平稳下降,单位GDP产值产生包装废物的系数基本保持稳定,但各国包装废物人均产生量存在较大差异。     

Oil Spill Modeling towards the Close of the 20th Century: Overview of the State of the Art

The state-of-the-art in oil spill modeling is summarized, focusing primarily on the years from 1990 to the present. All models seek to describe the key physical and chemical processes that transport and weather the oil on and in the sea. Current insights into the mechanisms of these processes and the availability of algorithms for describing and predicting process rates are discussed. Advances are noted in the areas of advection, spreading, evaporation, dispersion, emulsification, and interactions with ice and shorelines. Knowledge of the relationship between oil properties, and oil weathering and fate, and the development of models for the evaluation of oil spill response strategies are summarized. Specific models are used as examples where appropriate. Future directions in these and other areas are indicated     

Pyrolysis of tyres. Influence of the final temperature of the process on emissions and the calorific value of the products recovered

A study was made of the pyrolysis of tyre particles, with the aim of determining the possibilities of using the products resulting from the process as fuel. Three final temperatures were used, determined from thermogravimetric data. The design of the experiment was a horizontal oven containing a reactor into which particles of the original tyre were placed. After the process, a solid fraction (char) remained in the reactor, while the gases generated went through a set of scrubbers where most of the condensable fraction (oils) was retained. Finally, once free of this fraction, the gases were collected in glass ampoules. Solid and liquids fractions were subjected to thermogravimetric analyses in order to study their combustibility. The gas fraction was analysed by means of gas chromatography to establish the content of CO, CO2, H2 and hydrocarbons present in the samples (mainly components of gases produced in the pyrolysis process). A special study was made of the sulphur and chlorine content of all the fractions, as the presence of these elements could be problematic if the products are used as fuel. Tyre pyrolysis engenders a solid carbon residue that concentrates sulphur and chorine, with a relatively high calorific value, although not so high as that of the original tyre. The liquid fraction produced by the process has a high calorific value, which rises with the final temperature, up to 40 MJ/kg. The chlorine content of this fraction is negligible. Over 95% of the gas fraction, regardless of the final temperature, is composed of hydrocarbons of a low molecular weight and hydrogen, this fraction also appearing to be free of chlorine.     

Economic aspects of the rehabilitation of the Hiriya landfill

The Hiriya landfill, Israel's largest, operated from 1952 to 1998. The landfill, located in the heart of the Dan Region, developed over the years into a major landscape nuisance and environmental hazard. In 1998, the Israeli government decided to close the landfill, and in 2001 rehabilitation activities began at the site, including site investigations, engineering and scientific evaluations, and end-use planning. The purpose of the present research is to perform a cost-benefit analysis of engineering and architectural-landscape rehabilitation projects considered for the site. An engineering rehabilitation project is required for the reduction of environmental impacts such as greenhouse gas emissions, slope instability and leachate formation. An architectural-landscape rehabilitation project would consider improvements to the site to make it suitable for future end uses such as a public park. The findings reveal that reclamation is worthwhile only in the case of architectural-landscape rehabilitation of the landfill, converting it into a public park. Engineering rehabilitation alone was found to be unjustified, but is essential to enable the development of a public park.     

Comparative Thermodynamic Study on the Contribution of the Autocondensation and Copolymerization Reactions for the Tannins of the Subspecies of Acacia nilotica

Autocondensation and copolymerization reactions of the Acacia nilotica subspecies tomentosa (Ant) and the subspecies adansonii (Ana) tannins extracts solutions have been studied at several pH values by thermomechanical analyzer. Results of chemical analysis of these tannins revealed that the studied tannins, Ant and Ana contained high percentages of extractable tannins (54 and 57 %) for and polyphenolic materials (78 and 80 %) respectively. Different hardeners such as paraformaldehyde, Urea and pMDI were added at different ratios and their polycondensation reactions was studied and compared with their autocondensation ones. The aim was to evaluate the tannins suitability for the production of commercially and technically viable tannin adhesives with reduced Formaldehyde emission for wood products and to study the interference between the autocondensation and the copolymerization reaction. The obtained results of autocondensation reaction for both of the tannins studied showed that the best Young’s modulus values for Ant (3,500 and 2,750 MPa) and Ana (2,650 and 2,620 MPa) were obtained at pH 5 and 7. The Young’s modulus values obtained by the tannins Ant were higher than those achieved by Ana. This indicates that the Ant is more reactive than Ana. These results were also in line with results achieved by the gel time for both of the tannins. Gel time results indicate that the reactivity of both tannins increased towards alkalinity with Ana being more reactive at alkaline pH. Addition of 8 % of paraformaldehyde was adversely affecting the autocondensation reactions, as the best Young’s modulus values were achieved at pH 4 for Ant tannins. As for Ana the higher Young’s modulus values (2,000 and 2,310 MPa) were achieved at pH 5 and 7. This indicates that autocondensation reaction was contributed to the final network of the copolymerization reaction. When smaller ratio of paraformaldehyde and Urea (5 %) was added to Ant tannins it favors the autocondensation reaction and the best Young’s modulus values were obtained at pH 5 and 7. Addition of pMDI (10–30 %) was found to decrease the temperature of copolymerization and the obtained Young’s modulus values by Ant were lower than those obtained by autocodensation reaction. Best Young’ modulus values were obtained by Ant at pH 5 and 7. Ana gave the best Young’s modulus values at pH 4 and 5 indicating that the autocondensation appears to depress the copolymerization reactions. The obtained results by both reactions were very important from technical and economical point of view as they concluded that it is very possible to produce adhesives system with zero emission depending on the tannins autocondensation reaction and pH values. Reduction of formaldehyde emission was also possible upon addition of smaller amount of paraformaldehyde and Urea.     

日本包装废物管理体系和产生特性分析

介绍了日本的资源循环法律体系和促进容器包装分类回收和再商品化的法律和有关方针,介绍了日本容器和包装的管理体制和主要措施,以及各类包装废物回收利用状况和特点。     

A comparison of the comprehensive municipal solid waste management systems of the region of Prague and the principality of Asturias. the influence of collection systems and municipality size on the waste collection and the recycling rates

Journal of Material Cycles and Waste Management - The correct management of municipal solid waste (MSW) is a critical factor in the protection of the environment, as well as a source for the...     

On the Methods for the Delimitation of Seasons

It is well known that air pollution is one of the major factors affecting human health and the activities in a town. Among the various air pollutants an interesting one, especially for sunny climates, is the reactive O₃. O₃ varies significantly through the year; it is therefore very important to know the onset and the duration of the warm period of the year since at that time O₃ concentrations increase significantly. In this work, an attempt was made to determine the onset of warm season of the year as well as its duration in various sites located in Northeastern Mediterranean. For this purpose, a fuzzy clustering method is used. The method was applied on the isobaric thickness between 1000 and 500 hPa for the period from 1974 to 1997. The results were compared to conventional methods based on synoptic classification and were found to be in good agreement.